Regional Airlines Using Rockwell Collins ADS-B Systems Most Affected

Regional carriers operating for American, United and Delta Airlines were forced to cancel hundreds of flights over the weekend due to an issue with their GPS systems.

Forbes reports that the FAA issued an advisory saying "Certain aircraft equipped with the Rockwell Collins GPS 4000-100 and select ADS-B Our GPS receivers are indicating "ADS-B Fail, unavailable, TCAS Fail or Transponder Fail messages.

"The FAA command center (DCC) is suspending pre-coordination with DCC of those aircraft impacted by the Rockwell Collins GPS issue that have working transponders.

"Aircraft without working transponders must still coordinate as per directive.

"Aircraft must file the appropriate equipment suffice consistent with the aircraft capability to ensure access to RVSM airspace."

The FAA issued a later advisory issuing a blanket waiver for all flights experiencing the issue, but said affected flights must file flight plans keeping them below FL280 using RNAV routing. "If you are unable, you must file via traditional airways and/or NAVAIDS. This blanket approval is only valid until June 10, 0400Z," the advisory stated.

In a statement to CNBC, the FAA said it was "working to determine the cause of the problem, which may have resulted from a software update to the aircraft navigation systems."

(Image from file)

FMI: Source report
Source report
FAA Advisory